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refactor(templates): refactor TVariant::Visit to Visit

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This commit is contained in:
_Redstone_c_
2022-12-03 23:14:25 +08:00
parent 797386f3d6
commit 9cc7ac9480
2 changed files with 215 additions and 78 deletions
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83
Redcraft.Utility/Source/Private/Testing/TemplatesTesting.cpp
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@ -242,9 +242,64 @@ void TestVariant()
}
{
// TVariant<bool> TempA = false;
// TempA.Visit([](auto& A) { A = true; });
// always_check(TempA.GetValue<bool>());
using VariantType = TVariant<int32, int64, float64>;
VariantType TempArray[] = { 10, 15ll, 1.5 };
for(auto&& TempA : TempArray)
{
Visit(
[](auto&& A)
{
using T = TRemoveCVRef<decltype(A)>;
if constexpr (CSameAs<T, int32>) always_check(A == 10);
else if constexpr (CSameAs<T, int64>) always_check(A == 15ll);
else if constexpr (CSameAs<T, float64>) always_check(A == 1.5);
else always_check_no_entry();
},
TempA
);
VariantType TempB = Visit([](auto&& A) -> VariantType { return A + A; }, TempA);
Visit(
[](auto&& A, auto&& B)
{
using T = TRemoveCVRef<decltype(A)>;
if constexpr (CSameAs<T, int32>) always_check(A == 10 && B == 20);
else if constexpr (CSameAs<T, int64>) always_check(A == 15ll && B == 30ll);
else if constexpr (CSameAs<T, float64>) always_check(A == 1.5 && B == 3.0);
else always_check_no_entry();
},
TempA, TempB
);
Visit([](auto&& A) { A *= 2; }, TempA);
Visit(
[](auto&& A)
{
using T = TRemoveCVRef<decltype(A)>;
if constexpr (CSameAs<T, int32>) always_check(A == 20);
else if constexpr (CSameAs<T, int64>) always_check(A == 30ll);
else if constexpr (CSameAs<T, float64>) always_check(A == 3.0);
else always_check_no_entry();
},
TempA
);
}
for (auto&& TempA : TempArray) {
Visit(
TOverloaded
{
[](int32 A) { always_check(A == 20); },
[](int64 A) { always_check(A == 30ll); },
[](float64 A) { always_check(A == 3.0); },
[](auto A) { always_check_no_entry(); },
},
TempA
);
}
}
{
@ -272,10 +327,10 @@ void TestVariant()
bool bIsLValue;
bool bIsRValue;
auto TestQualifiers = [&bIsConst, &bIsLValue, &bIsRValue](auto&& Arg) -> int32
auto TestQualifiers = [&bIsConst, &bIsLValue, &bIsRValue](auto&& A) -> int32
{
using T = decltype(Arg);
always_check(Arg == 10);
using T = decltype(A);
always_check(A == 10);
always_check(CConst<TRemoveReference<T>> == bIsConst);
always_check(CLValueReference<T> == bIsLValue);
always_check(CRValueReference<T> == bIsRValue);
@ -287,7 +342,7 @@ void TestVariant()
bIsRValue = false;
TVariant<int32> TempLA = 10;
auto ReturnLA = TempLA.Visit(TestQualifiers);
auto ReturnLA = Visit(TestQualifiers, TempLA);
always_check((CSameAs<int32, decltype(ReturnLA)>));
bIsConst = true;
@ -295,7 +350,7 @@ void TestVariant()
bIsRValue = false;
const TVariant<int32> TempLB = TempLA;
auto ReturnLB = TempLB.Visit(TestQualifiers);
auto ReturnLB = Visit(TestQualifiers, TempLB);
always_check((CSameAs<int32, decltype(ReturnLB)>));
bIsConst = false;
@ -303,7 +358,7 @@ void TestVariant()
bIsRValue = true;
TVariant<int32> TempRA = 10;
auto ReturnRA = MoveTemp(TempRA).Visit(TestQualifiers);
auto ReturnRA = Visit(TestQualifiers, MoveTemp(TempRA));
always_check((CSameAs<int32, decltype(ReturnRA)>));
bIsConst = true;
@ -311,7 +366,7 @@ void TestVariant()
bIsRValue = true;
const TVariant<int32> TempRB = TempLA;
auto ReturnRB = MoveTemp(TempRB).Visit(TestQualifiers);
auto ReturnRB = Visit(TestQualifiers, MoveTemp(TempRB));
always_check((CSameAs<int32, decltype(ReturnRB)>));
bIsConst = false;
@ -319,7 +374,7 @@ void TestVariant()
bIsRValue = false;
TVariant<int32> TempLC = 10;
auto ReturnLC = TempLC.Visit<int32>(TestQualifiers);
auto ReturnLC = Visit<int32>(TestQualifiers, TempLC);
always_check((CSameAs<int32, decltype(ReturnLC)>));
bIsConst = true;
@ -327,7 +382,7 @@ void TestVariant()
bIsRValue = false;
const TVariant<int32> TempLD = TempLC;
auto ReturnLD = TempLD.Visit<int32>(TestQualifiers);
auto ReturnLD = Visit<int32>(TestQualifiers, TempLD);
always_check((CSameAs<int32, decltype(ReturnLD)>));
bIsConst = false;
@ -335,7 +390,7 @@ void TestVariant()
bIsRValue = true;
TVariant<int32> TempRC = 10;
auto ReturnRC = MoveTemp(TempRC).Visit<int32>(TestQualifiers);
auto ReturnRC = Visit<int32>(TestQualifiers, MoveTemp(TempRC));
always_check((CSameAs<int32, decltype(ReturnRC)>));
bIsConst = true;
@ -343,7 +398,7 @@ void TestVariant()
bIsRValue = true;
const TVariant<int32> TempRD = TempLC;
auto ReturnRD = MoveTemp(TempRD).Visit<int32>(TestQualifiers);
auto ReturnRD = Visit<int32>(TestQualifiers, MoveTemp(TempRD));
always_check((CSameAs<int32, decltype(ReturnRD)>));
}